tests/test-requires

store: simplify walking

- fold in main walking function
- eliminate recursion (especially recursive yielding!)
- eliminate default args

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m test -d "1000000 0"
rm .hg/requires
hg tip
echo indoor-pool > .hg/requires
hg tip

true